Improvement in ratchet-drills



UNITED STATEs PATENT OEEIGE.

JOSEPH C. STEBER, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN RATCH'ET-DRI LLS.

Specification forming part of Letters Patent No. 212,066, dated February4, 1879 application filed July 22, 1878.

To all whom t may concern:

Be it known that I, J osEPE C. STEDER, of the city and county of SanFrancisco, in the State of California, have invented a certain new anduseful Improvement in Ratchet- Drills 5 and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, and the figures and letters ofreference therein, making part of this specication.

My invention relates to an improved construction of that class ofextension ratchetdrills in which the parts are formed of telescopicsections having motion one upon the other, for the purpose of giving thedrill the capacity to work in different situations where either a longor a short drill is required.

By my improved construction of drill, as hereinafter more fullydescribed, the same tool can be used for different kinds of work,whether in an open or a contracted space, and the strength andcompactness of the parts are greatly increased.

The invention consists in the peculiar construction and combinations ofthe parts, as hereinafter pointed out.

In the said drawings, Figure l is a side view of my improvement. Fig. 2is a central longitudinal section. Fig. 3 is a detail view.

A represents a sleeve, having the ratchet a secured around it at one endfor the handle, and a socket, b, for the drill-bit, and fixed to itsopposite end a screw-nut, B. This sleeve ishollow, and tits yover ahollow screw, C', and inside ot' a larger sleeve, D, to which the screwC is secured at one end, at c. The screw C is screw-threaded for aportion of its length on the interior surface at d, and for its entirelength on the exterior surface. Upon this screw the nut B of the sleeveA travels between the two shoulders e f, one at the top otl the sleeve Dand the other at the bottom of the screw C, that act to limit itsmovements to the extent of the length of the screw and to prevent theparts from separating.

The outer sleeve, E, lits and works over the sleeve D, and is providedwith a central spindle, F, fixed to its bottom, and screw-threaded towork through the nut d.

These three parts AD E move one upon the other, and give a greater orless length of drill, as required.

The part A moves out from within the sleeve D by the action of thescrew-thread upon the outside of the hollow screw C and the fixed nut B,secured to the bottom end of the sleeve A, while the sleeve D moves outfrom the sleeve E by the operation of the screw-spindle F, xed to thebottom of the latter sleeve.

The two sleeves D E are provided with a catch, h, by which they arelocked and caused to travel together upon the inner sleeve, A, either inor out; but by sliding this catch out from the slot t' in the outersleeve these two parts are given a separate motion, and one is free tomove upon the other.

The construct-ion and combination of these parts ena-ble the length ofdrill to be quickly regulated and the drill-bit fed down as the workproceeds, while the tool is capable of adjustment to suit the locationwhere the holes are to be drilled.

I am aware that I am not the rst to make a ratchet-drill capable ofextension, and therefore do not broadly claim that feature as originalwith me; but,

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A ratchet-drill composed of the following parts or members: the innerhollow sleeves A D E, fitting and moving one upon the other, the hollowscrew C, with exterior screwthreaded surface and interior screw-thread,d, the screw-nut B, iixed to the sleeve A, and the screw-spindle F,fired to the sleeve E, constructed and combined together substantiallyas described.

2. In an extension ratchet-drill, substantially as described, thecombination, with the sleeve D, having the hollow screw C secured to itat one end, of the sleeve A, with its screw-nut B arranged to work uponthe outer screwthreaded surface and between the two stops e f,substantially as described and set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 13th day of June, 1878,.

JOSEPH C. STEBER. [L. s]

I'Vitnesses D. SELLECK, EDWARD E. OsBoRN.

